Trends in surgery for duodenal ulcer.
D000367:Age Factors; D002908:Chronic Disease; D004322:Drainage; D004381:Duodenal Ulcer / Q000601:surgery*; D005743:Gastrectomy / Q000401:mortality; D006471:Gastrointestinal Hemorrhage / Q000150:complications; D006801:Humans; D008722:Methods; D008875:Middle Aged; D011183:Postoperative Complications; D011708:Pylorus / Q000601:surgery*; D012189:Retrospective Studies; D014628:Vagotomy / Q000401:mortality